The M1128 Mobile Gun System is an eight-wheeled armored car of the Stryker armored fighting vehicle family, based on the Canadian LAV III light-armored vehicle manufactured by General Dynamics Canada.. It mounts a 105 mm tank gun. Following the end of the Cold War some theorists believed that the existing suite of U.S. armored vehicles, designed largely to fight Soviet mechanized forces in Europe, were not well suited to the lower-intensity missions U.S. armed forces would be tasked with later in engagements in Afghanistan and Iraq. This led to the development of a new armored fighting vehicle designed for lower-intensity combat, rather than large-scale engagements.

In late 2013, the U.S. Army began seeking to reintroduce an air-drop mobile airborne protected firepower platform to provide fire support for air assault forces, a capability that had been absent since the retirement of the M551 Sheridan in 1997. General Dynamics initially considered modifying the wheeled Stryker MGS to meet the requirement, but the company instead developed the tracked Griffin light tank technology demonstrator as its offering for the Mobile Protected Firepower (MPF) platform, which was unveiled in October 2016.